the question is:
how bad is it?
If it is starsan, it has more likely eaten than stained your benchtop
run your fingernail over it, it should feel pitted
If it is just a slight pitting, you may get away with a good hard polish (proper cutting compounds, all the way down to polish)
It will always be different, but it may be enough to make it not apparent.
Have not tried this, YMMV etc.
how bad is it?
If it is starsan, it has more likely eaten than stained your benchtop
run your fingernail over it, it should feel pitted
If it is just a slight pitting, you may get away with a good hard polish (proper cutting compounds, all the way down to polish)
It will always be different, but it may be enough to make it not apparent.
Have not tried this, YMMV etc.